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Code Issues Projects Releases Packages Wiki Activity Actions 8

Add IPv6 network support and --docker-subnets option for install/check

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- Add support for IPv6 networks in firewall rule generation and validation.
- Add --docker-subnets [SUBNET1 SUBNET2 ...] option to `ufw-docker install` and `ufw-docker check`.
- When used without arguments, automatically detects and applies all Docker network subnets.
- When given subnet arguments, applies firewall rules only to specified subnets (supports multiple subnets, including non-Docker-managed networks).
- If not specified, falls back to default RFC1918 IPv4 and fd00::/8 IPv6 subnets.
- Improve help output with detailed examples and usage guidance.
This commit is contained in:
Chai Feng 2025-07-02 16:52:56 +08:00
parent e9a9f13095
commit 168fc59905
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GPG key ID: 2DCD9A24E523FFD2
5 changed files with 512 additions and 152 deletions
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70
README.md
View file

@ -18,7 +18,7 @@ UFW is a popular iptables front end on Ubuntu that makes it easy to manage firew
The issue is:
1. UFW is enabled on a server that provides external services, and all incoming connections that are not allowed are blocked by default.
2. Run a Docker container on the server and use the `-p` option to publish ports for that container on all IP addresses.
2. Run a Docker container on the server and use the `-p` option to publish ports for that container on all IP addresses.
For example: `docker run -d --name httpd -p 0.0.0.0:8080:80 httpd:alpine`, this command will run an httpd service and publish port 80 of the container to port 8080 of the server.
3. UFW will not block all external requests to visit port 8080. Even the command `ufw deny 8080` will not prevent external access to this port.
4. This problem is actually quite serious, which means that a port that was originally intended to provide services internally is exposed to the public network.
@ -43,7 +43,7 @@ Almost all of these solutions are similar. It requires to disable docker's iptab
The solutions that we can find on internet are very similar and not elegant, I hope a new solution can:
- Don't need to disable Docker's iptables and let Docker to manage it's network.
- Don't need to disable Docker's iptables and let Docker to manage it's network.
We don't need to manually maintain iptables rules for any new Docker networks, and avoid potential side effects after disabling iptables in Docker.
- The public network cannot access ports that published by Docker. Even if the port is published on all IP addresses using an option like `-p 8080:80`. Containers and internal networks can visit each other normally.
Although it is possible to have Docker publish a container's port to the server's private IP address, the port will not be accessed on the public network. But, this server may have multiple private IP addresses, and these private IP addresses may also change.
@ -195,7 +195,7 @@ Doesn't support older versions of Ubuntu, and the command is a bit more complica
### IPv6
[Enable IPv6 support](https://forums.docker.com/t/docker-user-chain-for-ip6tables/133961/3) in Docker by specifying ULA range (RFC 4193) in `/etc/docker/daemon.json`
[Enable IPv6 support](https://forums.docker.com/t/docker-user-chain-for-ip6tables/133961/3) in Docker by specifying ULA range (RFC 4193) in `/etc/docker/daemon.json`
```json
{
"experimental": true,
@ -236,6 +236,36 @@ This command does the following things:
- Back up the file `/etc/ufw/after.rules`
- Append the rules of UFW and Docker at the end of the file
#### IPv6 support
`ufw-docker` also supports IPv6 networks and will update `/etc/ufw/after6.rules` when necessary.
### Using the `--docker-subnets` option
You can use the `--docker-subnets` option to customize which subnets will be allowed to communicate with Docker containers.
This option applies to both IPv4 and IPv6 networks.
* If the option is **not provided**, only standard private LAN subnets will be used
(IPv4: `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`; IPv6: `fd00::/8`)
* If `--docker-subnets` is given **without any arguments**, all Docker network subnets will be detected and used automatically.
**Note:** If you add or remove Docker networks, you need to run `ufw-docker install --docker-subnets` again to update the firewall rules according to the latest network configuration.
* If one or more subnets are specified, only these subnets will be used (you can list multiple subnets, separated by spaces; each should be in CIDR format).
The subnets can include networks not managed by Docker itself.
#### Examples
# Use default private LAN subnets (IPv4: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16; IPv6: fd00::/8)
ufw-docker install
# Auto-detect and use all Docker network subnets (both IPv4 and IPv6)
ufw-docker install --docker-subnets
# Only allow these specified subnets to communicate with Docker containers
ufw-docker install --docker-subnets 192.168.207.0/24 10.207.0.0/16 fd00:cf::/64
You can use the same options with `ufw-docker check` to preview the changes before applying them.
#### Install for Docker Swarm mode
We can only use this script on manager nodes to manage firewall rules when using in Swarm mode.
@ -305,7 +335,7 @@ Remove rules from all nodes related to the service `web`
### Try it out
We use [Vagrant](https://www.vagrantup.com/) to set up a local testing environment.
We use [Vagrant](https://www.vagrantup.com/) to set up a local testing environment.
Run the following command to create 1 master node and 2 worker nodes
@ -422,7 +452,7 @@ UFW 是 Ubuntu 上很流行的一个 iptables 前端，可以非常方便的管
COMMIT
# END UFW AND DOCKER
然后重启 UFW，`sudo systemctl restart ufw`。现在外部就已经无法访问 Docker 发布出来的任何端口了，但是容器内部以及私有网络地址上可以正常互相访问，而且容器也可以正常访问外部的网络。**可能由于某些未知原因，重启 UFW 之后规则也无法生效，请重启服务器。**
如果希望允许外部网络访问 Docker 容器提供的服务，比如有一个容器的服务端口是 `80`。那就可以用以下命令来允许外部网络访问这个服务：
@ -520,7 +550,8 @@ UFW 是 Ubuntu 上很流行的一个 iptables 前端，可以非常方便的管
### 支持 IPv6
[Enable IPv6 support](https://forums.docker.com/t/docker-user-chain-for-ip6tables/133961/3) in Docker by specifying ULA range (RFC 4193) in `/etc/docker/daemon.json`
要让 Docker Engine [启用 IPv6 的支持](https://forums.docker.com/t/docker-user-chain-for-ip6tables/133961/3). 你需要在 `/etc/docker/daemon.json` 文件中启用相关设置，并分配一个 ULA（唯一本地地址，RFC 4193）地址段作为 IPv6 网络范围。
```json
{
"experimental": true,
@ -556,6 +587,33 @@ UFW 是 Ubuntu 上很流行的一个 iptables 前端，可以非常方便的管
- 备份文件 `/etc/ufw/after.rules`
- 把 UFW 和 Docker 的相关规则添加到文件 `after.rules` 的末尾
#### IPv6 支持
`ufw-docker` 也支持 IPv6 网络，并会在需要时自动更新 `/etc/ufw/after6.rules` 文件。
### 使用 `--docker-subnets` 选项
你可以使用 `--docker-subnets` 选项，自定义允许与 Docker 容器通信的子网。
该选项同时适用于 IPv4 和 IPv6 网络。
* 如果**未指定**该选项，只会使用标准的私有局域网子网
（IPv4：`10.0.0.0/8`、`172.16.0.0/12`、`192.168.0.0/16`；IPv6：`fd00::/8`）
* 如果指定了 `--docker-subnets` 但**未带参数**，会自动检测并使用所有 Docker 网络的子网。
**注意：** 如果你对 Docker 网络进行了新增或删除操作，需要重新运行 `ufw-docker install --docker-subnets`，以便根据最新的网络配置更新防火墙规则。
* 如果指定了一个或多个子网，则只会使用这些子网（你可以用空格分隔多个子网，每个子网应为 CIDR 格式）。
这些子网可以包括非 Docker 管理的网络。
#### 示例
# 使用默认的私有局域网子网（IPv4：10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16；IPv6：fd00::/8）
ufw-docker install
# 自动检测并使用所有 Docker 网络的子网（同时支持 IPv4 和 IPv6）
ufw-docker install --docker-subnets
# 仅允许这些指定的子网与 Docker 容器通信
ufw-docker install --docker-subnets 192.168.207.0/24 10.207.0.0/16 fd00:cf::/64
#### 为 Docker Swarm 环境安装
仅仅可以在管理节点上使用 `ufw-docker` 这个脚本来管理防火墙规则。

190
Vagrantfile vendored
View file

@ -27,14 +27,35 @@ Vagrant.configure('2') do |config|
end
ip_prefix="192.168.56"
ip6_prefix="fd00:a:b"
worker_count=1
config.vm.provision 'docker-daemon-config', type: 'shell', inline: <<-SHELL
def env_true?(env_name)
value = ENV[env_name] || 'false'
true_values = %w[true yes on 1]
down = value.strip.downcase
return 'true' if true_values.include?(down)
'false'
end
def env_true_str?(env_name)
env_true?(env_name).to_s
end
config.vm.provision 'setup', preserve_order: true, type: 'shell', privileged: false, inline: <<-SHELL
byobu-ctrl-a screen
SHELL
config.vm.provision 'docker-daemon-config', type: 'shell', inline: <<-SHELL
set -eu
if [[ ! -f /etc/docker/daemon.json ]]; then
[[ -f /etc/profile.d/editor.sh ]] || echo 'export EDITOR=vim' > /etc/profile.d/editor.sh
if [[ "$(hostname)" = @(master|node?) && ! -f /etc/docker/daemon.json ]]; then
echo '{' >> /etc/docker/daemon.json
echo ' "insecure-registries": ["localhost:5000", "#{ip_prefix}.130:5000"]' >> /etc/docker/daemon.json
[[ -n "#{ENV['DOCKER_REGISTRY_MIRROR']}" ]] &&
echo ' , "registry-mirrors": ["#{ENV['DOCKER_REGISTRY_MIRROR']}"]' >> /etc/docker/daemon.json
#{env_true_str?('ENABLE_DOCKER_IPV6')} &&
echo ' ,"ip6tables": true, "ipv6": true, "fixed-cidr-v6": "#{ip6_prefix}:deaf::/64"' >> /etc/docker/daemon.json
echo '}' >> /etc/docker/daemon.json
if type systemctl &>/dev/null; then
systemctl restart docker
@ -44,27 +65,30 @@ Vagrant.configure('2') do |config|
fi
SHELL
config.vm.provision 'ufw-docker', type: 'shell', inline: <<-SHELL
set -euo pipefail
config.vm.provision 'ufw-docker', preserve_order: true, type: 'shell', inline: <<-SHELL
set -xeuo pipefail
export DEBUG=true
lsb_release -is | grep -Fi ubuntu
/vagrant/ufw-docker check || {
ufw allow OpenSSH
ufw allow from #{ip_prefix}.128/28 to any
yes | ufw enable || true
ufw status | grep '^Status: active'
declare -a subnets=(--docker-subnets 192.168.56.128/28 10.0.0.0/8 172.16.0.0/12)
#{env_true_str?('ENABLE_DOCKER_IPV6')} &&
subnets+=(fd00:a:b:deaf::/64 fd05:8f23:c937:1::/64 fd05:8f23:c937:2::/64 fd05:8f23:c937::/64)
if [[ "$(hostname)" = @(master|node?) ]]; then
/vagrant/ufw-docker check "${subnets[@]-}" >/dev/null 2>&1 || {
ufw allow OpenSSH
ufw allow from #{ip_prefix}.128/28 to any
#{env_true_str?('ENABLE_DOCKER_IPV6')} &&
ufw allow from #{ip6_prefix}:0:cafe::/80 to any
/vagrant/ufw-docker install
yes | ufw enable || true
ufw status | grep '^Status: active'
sed -i -e 's,192\.168\.0\.0/16,#{ip_prefix}.128/28,' /etc/ufw/after.rules
systemctl restart ufw
/vagrant/ufw-docker install "${subnets[@]-}"
systemctl restart ufw
}
[[ -L /usr/local/bin/ufw-docker ]] || ln -s /vagrant/ufw-docker /usr/local/bin/
iptables -I DOCKER-USER 4 -p udp -j LOG --log-prefix '[UFW DOCKER] '
}
fi
SHELL
private_registry="#{ip_prefix}.130:5000"
@ -73,10 +97,14 @@ Vagrant.configure('2') do |config|
master_ip_address = "#{ip_prefix}.130"
master.vm.hostname = "master"
master.vm.network "private_network", ip: "#{master_ip_address}"
if env_true?('ENABLE_DOCKER_IPV6')
master.vm.network "private_network", ip: "#{ip6_prefix}:0:cafe::130", type: "static", netmast: 64, auto_config: true
end
master.vm.provision "unit-testing", preserve_order: true, type: 'shell', inline: <<-SHELL
master.vm.provision "unit-testing", preserve_order: true, type: 'shell', privileged: false, inline: <<-SHELL
set -euo pipefail
/vagrant/test.sh
[[ -n "#{ENV['DISABLE_UNIT_TESTING']}" ]] ||
/vagrant/test.sh
SHELL
master.vm.provision "docker-registry", preserve_order: true, type: 'docker' do |d|
@ -103,7 +131,7 @@ Vagrant.configure('2') do |config|
echo "Defaults env_keep += DEBUG" >> /etc/sudoers.d/98_ufw-docker
SHELL
master.vm.provision "swarm-init", preserve_order: true, type: 'shell', inline: <<-SHELL
master.vm.provision "swarm-init", preserve_order: true, type: 'shell', privileged: false, inline: <<-SHELL
set -euo pipefail
docker info | fgrep 'Swarm: active' && exit 0
@ -111,8 +139,8 @@ Vagrant.configure('2') do |config|
docker swarm join-token worker --quiet > /vagrant/.vagrant/docker-join-token
SHELL
master.vm.provision "build-webapp", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
master.vm.provision "build-webapp", preserve_order: true, type: 'shell', privileged: false, inline: <<-SHELL
set -xeuo pipefail
docker build -t #{private_registry}/chaifeng/hostname-webapp - <<\\DOCKERFILE
FROM httpd:alpine
@ -130,7 +158,7 @@ DOCKERFILE
SHELL
master.vm.provision "local-webapp", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
set -xeuo pipefail
for name in public:18080 local:8000; do
webapp="${name%:*}_webapp"
port="${name#*:}"
@ -144,12 +172,16 @@ DOCKERFILE
SHELL
master.vm.provision "multiple-network", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
set -xeuo pipefail
declare -a docker_opts=()
if ! docker network ls | grep -F foo-internal; then
docker network create --internal foo-internal
! #{env_true_str?('ENABLE_DOCKER_IPV6')} || docker_opts=(--ipv6 --subnet fd05:8f23:c937:1::/64)
docker network create --internal "${docker_opts[@]}" foo-internal
fi
if ! docker network ls | grep -F bar-external; then
docker network create bar-external
! #{env_true_str?('ENABLE_DOCKER_IPV6')} || docker_opts=(--ipv6 --subnet fd05:8f23:c937:2::/64)
docker network create "${docker_opts[@]}" bar-external
fi
for app in internal-multinet-app:7000 public-multinet-app:17070; do
@ -167,33 +199,42 @@ DOCKERFILE
SHELL
master.vm.provision "swarm-webapp", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
set -xeuo pipefail
declare -a docker_opts=()
if #{env_true_str?('ENABLE_DOCKER_IPV6')}; then
docker inspect ip6net >/dev/null ||
docker network create --driver overlay --ipv6 ip6net
docker_opts+=(--network ip6net)
fi
for name in public:29090 local:9000; do
webapp="${name%:*}_service"
port="${name#*:}"
if docker service inspect "$webapp" &>/dev/null; then docker service rm "$webapp"; fi
docker service create --name "$webapp" \
--publish "${port}:80" --env name="$webapp" --replicas 3 #{private_registry}/chaifeng/hostname-webapp
docker service create --name "$webapp" "${docker_opts[@]}" \
--publish "${port}:80" --env name="$webapp" --replicas #{worker_count} #{private_registry}/chaifeng/hostname-webapp
done
ufw-docker service allow public_service 80/tcp
docker service inspect "public_multiport" ||
docker service create --name "public_multiport" \
docker service create --name "public_multiport" "${docker_opts[@]}" \
--publish "40080:80" --publish "47000:7000" --publish "48080:8080" \
--env name="public_multiport" --replicas 3 #{private_registry}/chaifeng/hostname-webapp
--env name="public_multiport" --replicas #{worker_count + 1} #{private_registry}/chaifeng/hostname-webapp
ufw-docker service allow public_multiport 80/tcp
ufw-docker service allow public_multiport 8080/tcp
SHELL
end
1.upto 1 do |ip|
1.upto worker_count do |ip|
config.vm.define "node#{ip}" do | node |
node.vm.hostname = "node#{ip}"
node.vm.network "private_network", ip: "#{ip_prefix}.#{ 130 + ip }"
if env_true?('ENABLE_DOCKER_IPV6')
node.vm.network "private_network", ip: "#{ip6_prefix}:0:cafe::#{ 130 + ip }", type: "static", netmast: 64, auto_config: true
end
node.vm.provision "swarm-join", preserve_order: true, type: 'shell', inline: <<-SHELL
node.vm.provision "node#{ip}-swarm-join", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
docker info | fgrep 'Swarm: active' && exit 0
@ -206,38 +247,89 @@ DOCKERFILE
config.vm.define "node-internal" do |node|
node.vm.hostname = "node-internal"
node.vm.network "private_network", ip: "#{ip_prefix}.142"
if env_true?('ENABLE_DOCKER_IPV6')
node.vm.network "private_network", ip: "#{ip6_prefix}:0:cafe::142", type: "static", netmast: 64, auto_config: true
end
end
config.vm.define "external" do |external|
external.vm.hostname = "external"
external.vm.network "private_network", ip: "#{ip_prefix}.127"
if env_true?('ENABLE_DOCKER_IPV6')
external.vm.network "private_network", ip: "#{ip6_prefix}:0:eeee::127", type: "static", netmast: 64, auto_config: true
end
external.vm.provision "testing", preserve_order: true, type: 'shell', inline: <<-SHELL
set -euo pipefail
set -x
server="http://#{ip_prefix}.130"
external.vm.provision "testing", preserve_order: true, type: 'shell', privileged: false, inline: <<-SHELL
set -xuo pipefail
error_count=0
function test-webapp() {
if timeout 3 curl --silent "$@"
then echo "Success: $*"
else echo "Cannot visit: $*"; return 1
local actual=""
if [[ "$#" -eq 2 ]]; then
local expect_fail='!'
url="$2"
else
url="$1"
fi
timeout 3 curl --silent "$url" || actual='!'
if [[ "${expect_fail:-}" = "${actual}" ]]; then
echo "OK: '$url' is ${expect_fail:+NOT }accessible${expect_fail:+ (should NOT be)}."
else
echo "FAIL: '$url' is ${expect_fail:+}${expect_fail:-NOT }accessible${expect_fail:-}."
(( ++ error_count ))
return 1
fi
} 2>/dev/null
function run_tests() {
local server="$1"
test-webapp "$server:18080"
test-webapp ! "$server:8000"
test-webapp "$server:17070" # multiple networks app
test-webapp ! "$server:7000" # internal multiple networks app
# Docker Swarm
test-webapp ! "$server:9000"
test-webapp ! "$server:47000"
}
test-webapp "$server:18080"
! test-webapp "$server:8000"
function run_tests_ipv4() {
local server="$1"
# Docker Swarm
test-webapp "$server:29090"
test-webapp "$server:17070" # multiple networks app
! test-webapp "$server:7000" # internal multiple networks app
test-webapp "$server:40080"
test-webapp "$server:48080"
test-webapp "$server:29090"
! test-webapp "$server:9000"
}
function run_tests_ipv6() {
local server="$1"
test-webapp "$server:40080"
test-webapp "$server:48080"
! test-webapp "$server:47000"
echo TODO: It seems that Docker Swarm does not support IPv6 well >&2
test-webapp ! "$server:29090" # it is accessible via IPv4
test-webapp ! "$server:40080" # it is accessible via IPv4
test-webapp ! "$server:48080" # it is accessible via IPv4
}
run_tests "http://#{ip_prefix}.130"
run_tests_ipv4 "http://#{ip_prefix}.130"
if #{env_true_str?('ENABLE_DOCKER_IPV6')}; then
run_tests "http://[#{ip6_prefix}:0:cafe::130]"
run_tests_ipv6 "http://[#{ip6_prefix}:0:cafe::130]"
fi
{
echo "====================="
echo " TEST DONE "
if [[ "$error_count" -eq 0 ]]; then echo " TEST DONE "
else echo " TESTS FAIL: ${error_count}"
fi
echo "====================="
exit "${error_count}"
} 2>/dev/null
SHELL
end
end

1
test/ufw-docker-service.test.sh
View file

@ -284,6 +284,7 @@ test-ufw-docker--service-delete-matches-assert() {
docker service update --update-parallelism=0 \
--env-add ufw_docker_agent_image="${ufw_docker_agent_image}" \
--env-add "ufw_public_abcd1234=webapp/deny" \
--env-add "DEBUG=false" \
--image "${ufw_docker_agent_image}" \
"${ufw_docker_agent}"
}

164
test/ufw-docker.test.sh
View file

@ -128,6 +128,14 @@ test-ufw-docker-install-assert() {
}
test-ufw-docker-install--docker-subnets() {
ufw-docker install --docker-subnets
}
test-ufw-docker-install--docker-subnets-assert() {
ufw-docker--install --docker-subnets
}
test-ufw-docker-check() {
ufw-docker check
}
@ -136,6 +144,14 @@ test-ufw-docker-check-assert() {
}
test-ufw-docker-check--docker-subnets() {
ufw-docker check --docker-subnets
}
test-ufw-docker-check--docker-subnets-assert() {
ufw-docker--check --docker-subnets
}
test-ufw-docker-service() {
ufw-docker service allow httpd
}
@ -198,7 +214,7 @@ test-ufw-docker-list-httpd() {
ufw-docker list httpd
}
test-ufw-docker-list-httpd-assert() {
ufw-docker--list httpd-container-name "" tcp ""
ufw-docker--list 'httpd-container-name\(/v6\)\?' "" tcp ""
}
@ -246,21 +262,12 @@ test-ASSERT-FAIL-ufw-docker-allow-httpd-INVALID-port() {
}
test-ufw-docker-list-httpd() {
@mock ufw-docker--instance-name httpd === @stdout httpd-container-name
ufw-docker list httpd
}
test-ufw-docker-list-httpd-assert() {
ufw-docker--list httpd-container-name "" tcp ""
}
test-ufw-docker-delete-allow-httpd() {
@mock ufw-docker--instance-name httpd === @stdout httpd-container-name
ufw-docker delete allow httpd
}
test-ufw-docker-delete-allow-httpd-assert() {
ufw-docker--delete httpd-container-name "" tcp ""
ufw-docker--delete 'httpd-container-name\(/v6\)\?' "" tcp ""
}
@ -277,8 +284,15 @@ function setup-ufw-docker--allow() {
load-ufw-docker-function ufw-docker--allow
@mocktrue docker inspect instance-name
@mock docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{"\n"}}{{end}}' instance-name === @stdout 172.18.0.3
@mock docker inspect --format='{{range $k, $v := .NetworkSettings.Networks}}{{printf "%s\n" $k}}{{end}}' instance-name === @stdout default
@mock docker inspect --format '{{range $name, $net := .NetworkSettings.Networks}}{{if $net.IPAddress}}{{$name}} {{$net.IPAddress}}{{"\n"}}{{end}}{{if $net.GlobalIPv6Address}}{{$name}} {{$net.GlobalIPv6Address}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout "default 172.18.0.3"
@mock docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{with $conf}}{{$p}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout 5000/tcp 8080/tcp 5353/udp
}
function setup-IPv6-ufw-docker--allow() {
load-ufw-docker-function ufw-docker--allow
@mocktrue docker inspect instance-name
@mock docker inspect --format '{{range $name, $net := .NetworkSettings.Networks}}{{if $net.IPAddress}}{{$name}} {{$net.IPAddress}}{{"\n"}}{{end}}{{if $net.GlobalIPv6Address}}{{$name}} {{$net.GlobalIPv6Address}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout "default 172.18.0.3" "default fd00:cf::42"
@mock docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{with $conf}}{{$p}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout 5000/tcp 8080/tcp 5353/udp
}
@ -286,8 +300,15 @@ function setup-ufw-docker--allow--multinetwork() {
load-ufw-docker-function ufw-docker--allow
@mocktrue docker inspect instance-name
@mock docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{"\n"}}{{end}}' instance-name === @stdout 172.18.0.3 172.19.0.7
@mock docker inspect --format='{{range $k, $v := .NetworkSettings.Networks}}{{printf "%s\n" $k}}{{end}}' instance-name === @stdout default awesomenet
@mock docker inspect --format '{{range $name, $net := .NetworkSettings.Networks}}{{if $net.IPAddress}}{{$name}} {{$net.IPAddress}}{{"\n"}}{{end}}{{if $net.GlobalIPv6Address}}{{$name}} {{$net.GlobalIPv6Address}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout "default 172.18.0.3" "awesomenet 172.19.0.7"
@mock docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{with $conf}}{{$p}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout 5000/tcp 8080/tcp 5353/udp
}
function setup-IPv6-ufw-docker--allow--multinetwork() {
load-ufw-docker-function ufw-docker--allow
@mocktrue docker inspect instance-name
@mock docker inspect --format '{{range $name, $net := .NetworkSettings.Networks}}{{if $net.IPAddress}}{{$name}} {{$net.IPAddress}}{{"\n"}}{{end}}{{if $net.GlobalIPv6Address}}{{$name}} {{$net.GlobalIPv6Address}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout "default 172.18.0.3" "default fd00:cf::42" "awesomenet 172.19.0.7" "awesomenet fd00:cf::207"
@mock docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{with $conf}}{{$p}}{{"\n"}}{{end}}{{end}}' instance-name === @stdout 5000/tcp 8080/tcp 5353/udp
}
@ -387,6 +408,83 @@ test-ufw-docker--allow-instance-all-published-port-multinetwork-select-network-a
ufw-docker--add-rule instance-name 172.19.0.7 5353 udp awesomenet
}
test-IPv6-ufw-docker--allow-instance-and-match-the-port() {
setup-IPv6-ufw-docker--allow
ufw-docker--allow instance-name 5000 tcp
}
test-IPv6-ufw-docker--allow-instance-and-match-the-port-assert() {
ufw-docker--add-rule instance-name 172.18.0.3 5000 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5000 tcp default
}
test-IPv6-ufw-docker--allow-instance-all-published-port() {
setup-IPv6-ufw-docker--allow
ufw-docker--allow instance-name "" ""
}
test-IPv6-ufw-docker--allow-instance-all-published-port-assert() {
ufw-docker--add-rule instance-name 172.18.0.3 5000 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5000 tcp default
ufw-docker--add-rule instance-name 172.18.0.3 8080 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 8080 tcp default
ufw-docker--add-rule instance-name 172.18.0.3 5353 udp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5353 udp default
}
test-IPv6-ufw-docker--allow-instance-all-published-tcp-port() {
setup-IPv6-ufw-docker--allow
ufw-docker--allow instance-name "" tcp
}
test-IPv6-ufw-docker--allow-instance-all-published-tcp-port-assert() {
ufw-docker--add-rule instance-name 172.18.0.3 5000 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5000 tcp default
ufw-docker--add-rule instance-name 172.18.0.3 8080 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 8080 tcp default
ufw-docker--add-rule instance-name 172.18.0.3 5353 udp default # FIXME
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5353 udp default # FIXME
}
test-IPv6-ufw-docker--allow-instance-all-published-port-multinetwork() {
setup-IPv6-ufw-docker--allow--multinetwork
ufw-docker--allow instance-name "" ""
}
test-IPv6-ufw-docker--allow-instance-all-published-port-multinetwork-assert() {
ufw-docker--add-rule instance-name 172.18.0.3 5000 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5000 tcp default
ufw-docker--add-rule instance-name 172.19.0.7 5000 tcp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 5000 tcp awesomenet
ufw-docker--add-rule instance-name 172.18.0.3 8080 tcp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 8080 tcp default
ufw-docker--add-rule instance-name 172.19.0.7 8080 tcp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 8080 tcp awesomenet
ufw-docker--add-rule instance-name 172.18.0.3 5353 udp default
ufw-docker--add-rule instance-name/v6 fd00:cf::42 5353 udp default
ufw-docker--add-rule instance-name 172.19.0.7 5353 udp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 5353 udp awesomenet
}
test-IPv6-ufw-docker--allow-instance-all-published-port-multinetwork-select-network() {
setup-IPv6-ufw-docker--allow--multinetwork
ufw-docker--allow instance-name "" "" awesomenet
}
test-IPv6-ufw-docker--allow-instance-all-published-port-multinetwork-select-network-assert() {
ufw-docker--add-rule instance-name 172.19.0.7 5000 tcp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 5000 tcp awesomenet
ufw-docker--add-rule instance-name 172.19.0.7 8080 tcp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 8080 tcp awesomenet
ufw-docker--add-rule instance-name 172.19.0.7 5353 udp awesomenet
ufw-docker--add-rule instance-name/v6 fd00:cf::207 5353 udp awesomenet
}
test-ufw-docker--add-rule-a-non-existing-rule() {
@mockfalse ufw-docker--list webapp 5000 tcp ""
@ -410,7 +508,7 @@ test-ufw-docker--add-rule-a-non-existing-rule-with-network-assert() {
test-ufw-docker--add-rule-modify-an-existing-rule() {
@mocktrue ufw-docker--list webapp 5000 tcp default
@mocktrue ufw --dry-run route allow proto tcp from any to 172.18.0.4 port 5000 comment "allow webapp 5000/tcp default"
@mock ufw --dry-run route allow proto tcp from any to 172.18.0.4 port 5000 comment "allow webapp 5000/tcp default" === @echo
@mockfalse grep "^Skipping"
load-ufw-docker-function ufw-docker--add-rule
@ -423,6 +521,21 @@ test-ufw-docker--add-rule-modify-an-existing-rule-assert() {
}
test-IPv6-ufw-docker--add-rule-modify-an-existing-rule() {
@mocktrue ufw-docker--list webapp/v6 5000 tcp default
@mock ufw --dry-run route allow proto tcp from any to fd00:cf::42 port 5000 comment "allow webapp/v6 5000/tcp default" === @echo
@mockfalse grep "^Skipping"
load-ufw-docker-function ufw-docker--add-rule
ufw-docker--add-rule webapp/v6 fd00:cf::42 5000 tcp default
}
test-IPv6-ufw-docker--add-rule-modify-an-existing-rule-assert() {
ufw-docker--delete webapp/v6 5000 tcp default
ufw route allow proto tcp from any to fd00:cf::42 port 5000 comment "allow webapp/v6 5000/tcp default"
}
test-ufw-docker--add-rule-skip-an-existing-rule() {
@mocktrue ufw-docker--list webapp 5000 tcp ""
@mocktrue ufw --dry-run route allow proto tcp from any to 172.18.0.4 port 5000 comment "allow webapp 5000/tcp"
@ -438,8 +551,7 @@ test-ufw-docker--add-rule-skip-an-existing-rule-assert() {
test-ufw-docker--add-rule-modify-an-existing-rule-without-port() {
@mocktrue ufw-docker--list webapp "" tcp ""
@mocktrue ufw --dry-run route allow proto tcp from any to 172.18.0.4 comment "allow webapp"
@mock ufw --dry-run route allow proto tcp from any to 172.18.0.4 comment "allow webapp" === @echo
@mockfalse grep "^Skipping"
load-ufw-docker-function ufw-docker--add-rule
@ -484,11 +596,14 @@ test-ufw-docker--instance-name-found-an-id-assert() {
test-ufw-docker--list-name() {
@mocktrue ufw status numbered
@mockfalse grep "# allow foo\\( [[:digit:]]\\+\\/\\(tcp\\|udp\\)\\)\\( [[:graph:]]*\\)\$"
@mockfalse grep "# allow foo\\( [[:digit:]]\\+\\/\\(tcp\\|udp\\)\\)\$"
load-ufw-docker-function ufw-docker--list
ufw-docker--list foo
}
test-ufw-docker--list-name-assert() {
grep "# allow foo\\( [[:digit:]]\\+\\/\\(tcp\\|udp\\)\\)\\( [[:graph:]]*\\)\$"
grep "# allow foo\$"
}
test-ufw-docker--list-name-udp() {
@ -523,24 +638,23 @@ test-ufw-docker--list-name-80-udp-assert() {
test-ufw-docker--list-grep-without-network() {
@mocktrue ufw status numbered
@mockfalse grep "# allow foo\\( 80\\/udp\\)\\( [[:graph:]]*\\)\$"
load-ufw-docker-function ufw-docker--list
ufw-docker--list foo 80 udp
}
test-ufw-docker--list-grep-without-network-assert() {
grep "# allow foo\\( 80\\/udp\\)\$"
grep "# allow foo\\( 80\\/udp\\)\\( [[:graph:]]*\\)\$"
}
test-ufw-docker--list-grep-without-network-and-port() {
@mocktrue ufw status numbered
@mockfalse grep "# allow foo\\( 80\\/udp\\)\\( [[:graph:]]*\\)\$"
@mockfalse grep "# allow foo\\( 80\\/udp\\)\$"
@mockfalse grep "# allow foo\\( 80\\/tcp\\)\\( [[:graph:]]*\\)\$"
load-ufw-docker-function ufw-docker--list
ufw-docker--list foo 80 udp
ufw-docker--list foo 80
}
test-ufw-docker--list-grep-without-network-and-port-assert() {
grep "# allow foo\$"
grep "# allow foo\\( 80\\/tcp\\)\$"
}

239
ufw-docker
View file

@ -24,7 +24,7 @@ fi
test -n "$ufw_docker_agent_image"
function ufw-docker--status() {
ufw-docker--list "$GREP_REGEXP_INSTANCE_NAME" | uniq
ufw-docker--list "$GREP_REGEXP_INSTANCE_NAME\(/v6\)\?"
}
function ufw-docker--list() {
@ -32,6 +32,7 @@ function ufw-docker--list() {
local INSTANCE_PORT="${2:-}"
local PROTO="${3:-${DEFAULT_PROTO}}"
local NETWORK="${4:-}"
local params_count="$#"
if [[ -z "$INSTANCE_PORT" ]]; then
INSTANCE_PORT="[[:digit:]]\\+"
@ -42,19 +43,16 @@ function ufw-docker--list() {
NETWORK="[[:graph:]]*"
fi
# IPv4
ufw status numbered | grep "# allow ${INSTANCE_NAME}\\( ${INSTANCE_PORT}\\/${PROTO}\\)\\( ${NETWORK}\\)\$" || \
ufw status numbered | grep "# allow ${INSTANCE_NAME}\\( ${INSTANCE_PORT}\\/${PROTO}\\)\$" || \
ufw status numbered | grep "# allow ${INSTANCE_NAME}\$"
local ufw_output
ufw_output="$(ufw status numbered)"
# IPv6
ufw status numbered | grep "# allow ${INSTANCE_NAME}_IPv6\\( ${INSTANCE_PORT}\\/${PROTO}\\)\\( ${NETWORK}\\)\$" || \
ufw status numbered | grep "# allow ${INSTANCE_NAME}_IPv6\\( ${INSTANCE_PORT}\\/${PROTO}\\)\$" || \
ufw status numbered | grep "# allow ${INSTANCE_NAME}_IPv6\$"
grep "# allow ${INSTANCE_NAME}\\( ${INSTANCE_PORT}\\/${PROTO}\\)\\( ${NETWORK}\\)\$" <<< "$ufw_output" ||
grep "# allow ${INSTANCE_NAME}\\( ${INSTANCE_PORT}\\/${PROTO}\\)\$" <<< "$ufw_output" ||
grep "# allow ${INSTANCE_NAME}\$" <<< "$ufw_output"
}
function ufw-docker--list-number() {
ufw-docker--list "$@" | sed -e 's/^\[[[:blank:]]*\([[:digit:]]\+\)\].*/\1/' | uniq
ufw-docker--list "$@" | sed -e 's/^\[[[:blank:]]*\([[:digit:]]\+\)\].*/\1/'
}
function ufw-docker--delete() {
@ -69,16 +67,15 @@ function ufw-docker--allow() {
local INSTANCE_PORT="$2"
local PROTO="$3"
local NETWORK="${4:-}"
local NETWORK_ADDRESSES PORT_PROTO_LIST PROT_PROTO IP SUFFIX
docker inspect "$INSTANCE_NAME" &>/dev/null ||
die "Docker instance \"$INSTANCE_NAME\" doesn't exist."
mapfile -t INSTANCE_IP_ADDRESSES < <(docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{"\n"}}{{end}}' "$INSTANCE_NAME" 2>/dev/null | remove_blank_lines)
mapfile -t INSTANCE_IP_V6_ADDRESSES < <(docker inspect --format='{{range .NetworkSettings.Networks}}{{.GlobalIPv6Address}}{{"\n"}}{{end}}' "$INSTANCE_NAME" 2>/dev/null | remove_blank_lines)
mapfile -t NETWORK_ADDRESSES < <(docker inspect --format '{{range $name, $net := .NetworkSettings.Networks}}{{if $net.IPAddress}}{{$name}} {{$net.IPAddress}}{{"\n"}}{{end}}{{if $net.GlobalIPv6Address}}{{$name}} {{$net.GlobalIPv6Address}}{{"\n"}}{{end}}{{end}}' "$INSTANCE_NAME" 2>/dev/null | remove_blank_lines)
[[ -z "${INSTANCE_IP_ADDRESSES:-}" ]] && die "Could not find a running instance \"$INSTANCE_NAME\"."
[[ -z "${NETWORK_ADDRESSES:-}" ]] && die "Could not find a running instance \"$INSTANCE_NAME\"."
mapfile -t INSTANCE_NETWORK_NAMES < <(docker inspect --format='{{range $k, $v := .NetworkSettings.Networks}}{{printf "%s\n" $k}}{{end}}' "$INSTANCE_NAME" 2>/dev/null | remove_blank_lines)
mapfile -t PORT_PROTO_LIST < <(docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{with $conf}}{{$p}}{{"\n"}}{{end}}{{end}}' "$INSTANCE_NAME" | remove_blank_lines)
if [[ -z "${PORT_PROTO_LIST:-}" ]]; then
@ -86,36 +83,26 @@ function ufw-docker--allow() {
return 1
fi
RETVAL=1
local count=0
for PORT_PROTO in "${PORT_PROTO_LIST[@]}"; do
if [[ -z "$INSTANCE_PORT" || "$PORT_PROTO" = "${INSTANCE_PORT}/${PROTO}" ]]; then
ITER=0
for IP in "${INSTANCE_IP_ADDRESSES[@]}"; do
INSTANCE_NETWORK="${INSTANCE_NETWORK_NAMES[$ITER]}"
ITER=$((ITER+1))
for item in "${NETWORK_ADDRESSES[@]}"; do
INSTANCE_NETWORK="${item% *}"
IP="${item#* }"
if [[ -n "$NETWORK" ]] && [[ "$NETWORK" != "$INSTANCE_NETWORK" ]]; then
continue
fi
ufw-docker--add-rule "$INSTANCE_NAME" "$IP" "${PORT_PROTO%/*}" "${PORT_PROTO#*/}" "${INSTANCE_NETWORK}"
RETVAL="$?"
done
ITER_V6=0
for IP in "${INSTANCE_IP_V6_ADDRESSES[@]}"; do
INSTANCE_NETWORK="${INSTANCE_NETWORK_NAMES[$ITER_V6]}"
ITER_V6=$((ITER_V6+1))
if [[ -n "$NETWORK" ]] && [[ "$NETWORK" != "$INSTANCE_NETWORK" ]]; then
continue
fi
ufw-docker--add-rule "${INSTANCE_NAME}_IPv6" "$IP" "${PORT_PROTO%/*}" "${PORT_PROTO#*/}" "${INSTANCE_NETWORK}"
RETVAL="$?"
if [[ "$IP" = *:* ]]; then SUFFIX="/v6"; else SUFFIX=""; fi
ufw-docker--add-rule "${INSTANCE_NAME}${SUFFIX}" "$IP" "${PORT_PROTO%/*}" "${PORT_PROTO#*/}" "${INSTANCE_NETWORK}"
(( ++count ))
done
fi
done
if [[ "$RETVAL" -ne 0 ]]; then
if [[ "$count" -eq 0 ]]; then
err "Fail to add rule(s), cannot find the published port ${INSTANCE_PORT}/${PROTO} of instance \"${INSTANCE_NAME}\" or cannot update outdated rule(s)."
return 1
fi
return "$RETVAL"
return 0
}
function ufw-docker--add-service-rule() {
@ -299,6 +286,7 @@ function ufw-docker--service-delete() {
docker service update --update-parallelism=0 \
--env-add ufw_docker_agent_image="${ufw_docker_agent_image}" \
--env-add "${service_env}" \
--env-add DEBUG="${DEBUG-}" \
--image "${ufw_docker_agent_image}" \
"${ufw_docker_agent}"
}
@ -315,13 +303,15 @@ function ufw-docker--check() {
iptables -n -L DOCKER-USER
err "\\n\\n########## diff $after_rules ##########"
ufw-docker--check-install && err "\\nCheck done."
ufw-docker--check-install "$@" && err "\\nCheck IPv4 firewall rules done."
err "\\n########## ip6tables -n -L DOCKER-USER ##########"
ip6tables -n -L DOCKER-USER
if command -v ip6tables >/dev/null 2>&1; then
err "\\n########## ip6tables -n -L DOCKER-USER ##########"
ip6tables -n -L DOCKER-USER
err "\\n\\n########## diff $after6_rules ##########"
ufw-docker--check-install_ipv6 && err "\\nCheck IPv6 done."
err "\\n\\n########## diff $after6_rules ##########"
ufw-docker--check-install_ipv6 "$@" && err "\\nCheck IPv6 firewall rules done."
fi
}
declare -a files_to_be_deleted
@ -339,12 +329,45 @@ function on-exit() {
trap on-exit EXIT INT TERM QUIT ABRT ERR
function ufw-docker--list-docker-subnets() {
local ipversion="$1"
shift || true
if [[ -z "${1-}" ]]; then
docker network ls --format '{{.ID}}' |
while read -r net; do
docker network inspect "$net" --format '{{range .IPAM.Config}}{{.Subnet}}{{"\n"}}{{end}}'
done
else
printf "%s\n" "$@"
fi |
while read -r cidr; do
if [[ "${ipversion}" = "IPv4" && "$cidr" = *.* ]] || [[ "${ipversion}" = "IPv6" && "$cidr" = *:* ]]
then echo "$cidr"
fi
done |
sort
}
function ufw-docker--check-install() {
declare -a cidr_list
declare cidr
if [[ -z "${1-}" ]]; then
cidr_list=(10.0.0.0/8 172.16.0.0/12 192.168.0.0/16)
elif [[ "${1-}" = '--docker-subnets' ]]; then
shift || true
mapfile -t cidr_list < <(ufw-docker--list-docker-subnets IPv4 "$@")
fi
if [[ -z "${cidr_list:-}" ]]; then
err "ERROR: Could not find any IPv4 subnets used by docker engine\n"
exit 1
fi
after_rules_tmp="${after_rules_tmp:-$(mktemp)}"
rm-on-exit "$after_rules_tmp"
sed "/^# BEGIN UFW AND DOCKER/,/^# END UFW AND DOCKER/d" "$after_rules" > "$after_rules_tmp"
>> "${after_rules_tmp}" cat <<-\EOF
{
cat <<-\EOF
# BEGIN UFW AND DOCKER
*filter
:ufw-user-forward - [0:0]
@ -352,18 +375,26 @@ function ufw-docker--check-install() {
:DOCKER-USER - [0:0]
-A DOCKER-USER -j ufw-user-forward
-A DOCKER-USER -j RETURN -s 10.0.0.0/8
-A DOCKER-USER -j RETURN -s 172.16.0.0/12
-A DOCKER-USER -j RETURN -s 192.168.0.0/16
EOF
for cidr in "${cidr_list[@]}"; do
echo "-A DOCKER-USER -j RETURN -s ${cidr}"
done
cat <<-\EOF
-A DOCKER-USER -p udp -m udp --sport 53 --dport 1024:65535 -j RETURN
-A DOCKER-USER -j ufw-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d 192.168.0.0/16
-A DOCKER-USER -j ufw-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d 10.0.0.0/8
-A DOCKER-USER -j ufw-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d 172.16.0.0/12
-A DOCKER-USER -j ufw-docker-logging-deny -p udp -m udp --dport 0:32767 -d 192.168.0.0/16
-A DOCKER-USER -j ufw-docker-logging-deny -p udp -m udp --dport 0:32767 -d 10.0.0.0/8
-A DOCKER-USER -j ufw-docker-logging-deny -p udp -m udp --dport 0:32767 -d 172.16.0.0/12
EOF
for cidr in "${cidr_list[@]}"; do
echo "-A DOCKER-USER -j ufw-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d ${cidr}"
done
for cidr in "${cidr_list[@]}"; do
echo "-A DOCKER-USER -j ufw-docker-logging-deny -p udp -m udp --dport 0:32767 -d ${cidr}"
done
cat <<-\EOF
-A DOCKER-USER -j RETURN
@ -373,19 +404,30 @@ function ufw-docker--check-install() {
COMMIT
# END UFW AND DOCKER
EOF
} >> "${after_rules_tmp}"
diff -u --color=auto "$after_rules" "$after_rules_tmp"
}
function ufw-docker--check-install_ipv6() {
DOCKER_IPV6_NETWORK=$(sed -En 's/.*"fixed-cidr-v6":.?"([^"]*).*/\1/p' /etc/docker/daemon.json)
[[ -z "${DOCKER_IPV6_NETWORK:-}" ]] && die "Could not find \"fixed-cidr-v6\" in \"/etc/docker/daemon.json\"."
declare -a cidr6_list
declare cidr
if [[ -z "${1-}" ]]; then
cidr6_list=(fd00::/8)
elif [[ "${1-}" = '--docker-subnets' ]]; then
shift || true
mapfile -t cidr6_list < <(ufw-docker--list-docker-subnets IPv6 "$@")
fi
if [[ -z "${cidr6_list:-}" ]]; then
err "INFO: Could not find any IPv6 subnets used by docker engine, will disable IPv6 support.\n"
return 0
fi
after6_rules_tmp="${after6_rules_tmp:-$(mktemp)}"
rm-on-exit "$after6_rules_tmp"
sed "/^# BEGIN UFW AND DOCKER/,/^# END UFW AND DOCKER/d" "$after6_rules" > "$after6_rules_tmp"
>> "${after6_rules_tmp}" cat <<-\EOF
{
cat <<-\EOF
# BEGIN UFW AND DOCKER
*filter
:ufw6-user-forward - [0:0]
@ -393,12 +435,22 @@ function ufw-docker--check-install_ipv6() {
:DOCKER-USER - [0:0]
-A DOCKER-USER -j ufw6-user-forward
-A DOCKER-USER -j RETURN -s {DOCKER_IPV6_NETWORK}
EOF
for cidr in "${cidr6_list[@]}"; do
echo "-A DOCKER-USER -j RETURN -s ${cidr}"
done
cat <<-\EOF
-A DOCKER-USER -p udp -m udp --sport 53 --dport 1024:65535 -j RETURN
EOF
-A DOCKER-USER -j ufw6-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d {DOCKER_IPV6_NETWORK}
-A DOCKER-USER -j ufw6-docker-logging-deny -p udp -m udp --dport 0:32767 -d {DOCKER_IPV6_NETWORK}
for cidr in "${cidr6_list[@]}"; do
echo "-A DOCKER-USER -j ufw6-docker-logging-deny -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -d ${cidr}"
echo "-A DOCKER-USER -j ufw6-docker-logging-deny -p udp -m udp --dport 0:32767 -d ${cidr}"
done
cat <<-\EOF
-A DOCKER-USER -j RETURN
@ -408,33 +460,31 @@ function ufw-docker--check-install_ipv6() {
COMMIT
# END UFW AND DOCKER
EOF
sed -i "s/{DOCKER_IPV6_NETWORK}/${DOCKER_IPV6_NETWORK/\//\\/}/g" "$after6_rules_tmp"
} >> "${after6_rules_tmp}"
diff -u --color=auto "$after6_rules" "$after6_rules_tmp"
}
function ufw-docker--install() {
if ! ufw-docker--check-install; then
local changed=false
if ! ufw-docker--check-install "$@"; then
changed=true
local after_rules_bak
after_rules_bak="${after_rules}-ufw-docker~$(date '+%Y-%m-%d-%H%M%S')~"
err "\\nBacking up $after_rules to $after_rules_bak"
cp "$after_rules" "$after_rules_bak"
cat "$after_rules_tmp" > "$after_rules"
err "Please restart UFW service manually by using the following command:"
if type systemctl &>/dev/null; then
err " sudo systemctl restart ufw"
else
err " sudo service ufw restart"
fi
fi
if ! ufw-docker--check-install_ipv6; then
if ! ufw-docker--check-install_ipv6 "$@"; then
changed=true
local after6_rules_bak
after6_rules_bak="${after6_rules}-ufw-docker~$(date '+%Y-%m-%d-%H%M%S')~"
err "\\nBacking up $after6_rules to $after6_rules_bak"
cp "$after6_rules" "$after6_rules_bak"
cat "$after6_rules_tmp" > "$after6_rules"
fi
if "$changed"; then
err "Please restart UFW service manually by using the following command:"
if type systemctl &>/dev/null; then
err " sudo systemctl restart ufw"
@ -444,6 +494,31 @@ function ufw-docker--install() {
fi
}
function ufw-docker--install--help() {
cat <<HELP
ufw-docker $1 --docker-subnets [SUBNET1 SUBNET2 …]
Specify which subnets should be used when configuring firewall rules for Docker containers and any allowed networks that communicate with containers.
- If this option is not provided, only standard private LAN subnets are used (RFC1918 for IPv4 and fd00::/8 for IPv6).
- If --docker-subnets is given without any arguments, all Docker network subnets will be automatically detected and used.
- If one or more subnets are specified, these subnets will be used for firewall rules, and they can include any networks that need to communicate with containers—not just the subnets configured by the Docker engine.
You can specify multiple subnets separated by spaces (each in CIDR format).
Examples:
- ufw-docker $1
Use only standard private subnets (default behavior).
- IPv4 subnets: 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
- IPv6 subnet: fd00::/8
- ufw-docker $1 --docker-subnets
Auto-detect and use all Docker network subnets.
- ufw-docker $1 --docker-subnets 10.207.0.0/16 192.168.207.0/24 fd00:cf::/64
Use only the specified subnets, including those outside of Docker’s own configuration, for all networks that should be allowed to communicate with containers.
HELP
}
function ufw-docker--help() {
cat <<-EOF >&2
Usage:
@ -453,19 +528,27 @@ function ufw-docker--help() {
ufw-docker service allow <swarm-service-id-or-name <port</tcp|/udp>>>
ufw-docker service delete allow <swarm-service-id-or-name>
ufw-docker <install|check> [--docker-subnets [SUBNET0 SUBNET1 ...]]
ufw-docker <status|install|check|help>
Examples:
ufw-docker help
ufw-docker check --help
ufw-docker install --help
ufw-docker check # Check the installation of firewall rules
ufw-docker install # Install firewall rules
ufw-docker check # Check the installation of firewall rules
ufw-docker check --docker-subnets # Auto-detect and use all Docker network subnets
ufw-docker check --docker-subnets 192.168.207.0/24 10.207.0.0/16 fd00:cf::/64
ufw-docker install # Install firewall rules
ufw-docker install --docker-subnets # Auto-detect and use all Docker network subnets
ufw-docker install --docker-subnets 192.168.207.0/24 10.207.0.0/16 fd00:cf::/64
ufw-docker status
ufw-docker list httpd
ufw-docker allow httpd
ufw-docker allow httpd 80
ufw-docker allow httpd 80/tcp
@ -534,14 +617,26 @@ case "$ufw_action" in
NETWORK="${1:-}"
INSTANCE_PORT="${INSTANCE_PORT%/*}"
;;&
delete|list)
"ufw-docker--$ufw_action" "$INSTANCE_NAME\\(/v6\\)\\?" "$INSTANCE_PORT" "$PROTO" "$NETWORK"
;;
allow)
"ufw-docker--$ufw_action" "$INSTANCE_NAME" "$INSTANCE_PORT" "$PROTO" "$NETWORK"
;;
service|raw-command|add-service-rule)
shift || true
"ufw-docker--$ufw_action" "$@"
;;
status|install|check)
install|check)
shift || true
if [[ "${1-}" = @(help|-h|--help) ]]; then
ufw-docker--install--help "$ufw_action"
exit
fi
"ufw-docker--$ufw_action" "$@"
;;
status)
ufw-docker--"$ufw_action"
;;
*)